[83.11] RXTE Monitoring of Anomalous X-ray Pulsars

The nature of anomalous X-ray pulsars (AXPs) has been a
mystery since the discovery of the first example some 20
years ago. As part of a long-term monitoring project, the
Rossi X-ray Timing Explorer has been used to observe
the 5 known AXPs on a monthly basis in an effort to test the
leading model for these sources, namely, that they are
magnetars. In this poster we will present recent results
from this project, including the sources' timing properties
as deduced from phase-coherent studies, the sources' pulsed
flux-time series, pulse morphology histories, as well as
phase-resolved spectroscopy.